124 lines
4.4 KiB
C
124 lines
4.4 KiB
C
/*
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* MIT License
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*
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* Copyright (c) 2020 Joey Castillo
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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static void extwake_callback(uint8_t reason);
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ext_irq_cb_t btn_alarm_callback;
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ext_irq_cb_t a2_callback;
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ext_irq_cb_t a4_callback;
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static void extwake_callback(uint8_t reason) {
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if (reason & RTC_TAMPID_TAMPID2) {
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if (btn_alarm_callback != NULL) btn_alarm_callback();
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} else if (reason & RTC_TAMPID_TAMPID1) {
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if (a2_callback != NULL) a2_callback();
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} else if (reason & RTC_TAMPID_TAMPID0) {
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if (a4_callback != NULL) a4_callback();
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}
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}
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void watch_register_extwake_callback(uint8_t pin, ext_irq_cb_t callback, bool level) {
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uint32_t pinmux;
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hri_rtc_tampctrl_reg_t config = hri_rtc_get_TAMPCTRL_reg(RTC, 0xFFFFFFFF);
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switch (pin) {
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case A4:
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a4_callback = callback;
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pinmux = PINMUX_PB00G_RTC_IN0;
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config &= ~(3 << RTC_TAMPCTRL_IN0ACT_Pos);
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config &= ~(1 << RTC_TAMPCTRL_TAMLVL0_Pos);
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config |= 1 << RTC_TAMPCTRL_IN0ACT_Pos;
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config |= 1 << RTC_TAMPCTRL_DEBNC0_Pos;
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if (level) config |= 1 << RTC_TAMPCTRL_TAMLVL0_Pos;
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break;
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case A2:
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a2_callback = callback;
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pinmux = PINMUX_PB02G_RTC_IN1;
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config &= ~(3 << RTC_TAMPCTRL_IN1ACT_Pos);
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config &= ~(1 << RTC_TAMPCTRL_TAMLVL1_Pos);
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config |= 1 << RTC_TAMPCTRL_IN1ACT_Pos;
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config |= 1 << RTC_TAMPCTRL_DEBNC1_Pos;
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if (level) config |= 1 << RTC_TAMPCTRL_TAMLVL1_Pos;
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break;
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case BTN_ALARM:
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gpio_set_pin_pull_mode(pin, GPIO_PULL_DOWN);
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btn_alarm_callback = callback;
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pinmux = PINMUX_PA02G_RTC_IN2;
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config &= ~(3 << RTC_TAMPCTRL_IN2ACT_Pos);
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config &= ~(1 << RTC_TAMPCTRL_TAMLVL2_Pos);
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config |= 1 << RTC_TAMPCTRL_IN2ACT_Pos;
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config |= 1 << RTC_TAMPCTRL_DEBNC2_Pos;
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if (level) config |= 1 << RTC_TAMPCTRL_TAMLVL2_Pos;
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break;
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default:
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return;
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}
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gpio_set_pin_direction(pin, GPIO_DIRECTION_IN);
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gpio_set_pin_function(pin, pinmux);
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// disable the RTC
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if (hri_rtcmode0_get_CTRLA_ENABLE_bit(RTC)) {
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hri_rtcmode0_clear_CTRLA_ENABLE_bit(RTC);
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hri_rtcmode0_wait_for_sync(RTC, RTC_MODE0_SYNCBUSY_ENABLE);
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}
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// update the configuration
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hri_rtc_write_TAMPCTRL_reg(RTC, config);
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// re-enable the RTC
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hri_rtcmode0_set_CTRLA_ENABLE_bit(RTC);
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_extwake_register_callback(&CALENDAR_0.device, extwake_callback);
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}
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void watch_store_backup_data(uint32_t data, uint8_t reg) {
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if (reg < 8) {
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RTC->MODE0.BKUP[reg].reg = data;
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}
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}
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uint32_t watch_get_backup_data(uint8_t reg) {
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if (reg < 8) {
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return RTC->MODE0.BKUP[reg].reg;
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}
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return 0;
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}
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void watch_enter_deep_sleep() {
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// enable and configure the external wake interrupt, if not already set up.
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if (btn_alarm_callback == NULL && a2_callback == NULL && a4_callback == NULL) {
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gpio_set_pin_direction(BTN_ALARM, GPIO_DIRECTION_IN);
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gpio_set_pin_pull_mode(BTN_ALARM, GPIO_PULL_DOWN);
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gpio_set_pin_function(BTN_ALARM, PINMUX_PA02G_RTC_IN2);
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_extwake_register_callback(&CALENDAR_0.device, extwake_callback);
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}
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// disable SLCD
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slcd_sync_deinit(&SEGMENT_LCD_0);
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hri_mclk_clear_APBCMASK_SLCD_bit(SLCD);
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// TODO: disable other peripherals
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// go into backup sleep mode
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sleep(5);
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}
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